check if channel does not exist discord.js

// Set the bot's presence (activity and status)
client.on("ready", () => {
    client.user.setPresence({
        game: { 
            name: 'my code',
            type: 'WATCHING'
        },
        status: 'idle'
    })
})

// Set the bot's online/idle/dnd/invisible status
client.on("ready", () => {
    client.user.setStatus("online");
});